Debt (Details) (USD $) In Thousands, unless otherwise specified									3 Months Ended																						3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Revolving Credit Facility	Dec. 31, 2012 Revolving Credit Facility	Mar. 31, 2013 Term Loan Facility	Dec. 31, 2012 Term Loan Facility	Mar. 31, 2013 Credit Agreement	Dec. 31, 2012 Credit Agreement	Mar. 31, 2013 Revolving Credit Facility and Outstanding Letters of Credit	Mar. 31, 2012 Revolving Credit Facility and Outstanding Letters of Credit	Mar. 31, 2013 The 7 1/4% Notes	Dec. 31, 2012 The 7 1/4% Notes	Mar. 31, 2013 The Subsidiary Notes	Dec. 31, 2012 The Subsidiary Notes	Mar. 31, 2013 The 8% Notes due 2018	Dec. 31, 2012 The 8% Notes due 2018	Mar. 31, 2013 The 6 3/4% Notes	Dec. 31, 2012 The 6 3/4% Notes	Mar. 31, 2013 The 7 3/4% Notes due 2019	Dec. 31, 2012 The 7 3/4% Notes due 2019	Mar. 31, 2013 The 8% Notes due 2020	Dec. 31, 2012 The 8% Notes due 2020	Mar. 31, 2013 The 8 3/8% Notes	Dec. 31, 2012 The 8 3/8% Notes	Mar. 31, 2013 The 5 3/4% notes due 2024	Dec. 31, 2012 The 5 3/4% notes due 2024	Mar. 31, 2013 Real Estate Mortgages, Capital Leases and Other	Dec. 31, 2012 Real Estate Mortgages, Capital Leases and Other	Mar. 31, 2013 New Credit Agreement	Jun. 27, 2011 New Credit Agreement	Mar. 31, 2013 New Credit Agreement Maximum	Mar. 31, 2013 New Credit Agreement Minimum	Mar. 31, 2013 New Revolving Credit Facility	Jun. 27, 2011 New Revolving Credit Facility item	Jun. 27, 2011 New Revolving Credit Facility, Tranche One	Jun. 27, 2011 New Revolving Credit Facility, Tranche Two	Jun. 27, 2011 New Revolving Credit Facility, Tranche Three	Mar. 31, 2013 New Term Loan Facility	Jun. 27, 2011 New Term Loan Facility
Long-term Debt Information
Carrying Amount	$ 3,849,706	$ 3,825,003	$ 110,400	$ 55,500	$ 456,250	$ 462,500					$ 227,985	$ 242,813	$ 171,981	$ 175,875	$ 49,841	$ 49,834	$ 325,389	$ 335,152	$ 400,000	$ 400,000	$ 300,000	$ 300,000	$ 548,561	$ 548,518	$ 1,000,000	$ 1,000,000	$ 259,299	$ 254,811
Less Current Portion	(91,853)	(92,887)
Long-term Debt, Net of Current Portion	3,757,853	3,732,116
Fair Value			110,400	55,500	456,250	462,500					227,985	242,813	176,496	181,591	55,305	56,052	335,044	341,753	444,510	451,000	314,250	317,250	607,063	610,500	997,500	1,012,500	259,299	254,811
Stated Interest Rate (as a percent)											7.25%	7.25%	7.50%	7.50%	8.00%	8.00%	6.75%	6.75%	7.75%	7.75%	8.00%	8.00%	8.375%	8.375%	5.75%	5.75%
Capital Stock of First Tier Foreign Subsidiaries Pledged to Secure Debt (as a percent)	66.00%
Ownership in U.S. Subsidiaries that are Considered Guarantor of Parent Notes (as a percent)	100.00%
Maximum Borrowing Capacity																																		725,000	400,000	150,000	175,000		500,000
Optional expanded maximum borrowing capacity																														1,800,000
Number of Banks Supporting the Credit Facility																																		19
Outstanding borrowings under credit facility																																	110,400
Letters of Credit Outstanding																													2,318
Remaining availability under credit facility																																	612,282
Effective interest rate (as a percent)																																	2.50%					2.00%
Commitment fees and letters of credit fees									$ 610	$ 600
Repayments Of Loan
Loan payment as a percentage of principal in first three quarterly installments of year five																																							10.00%
Loan payment as a percentage of principal in final quarterly installment of year five																																							35.00%
June 30, 2012 (as a percent)																																							5.00%
June 30, 2013 (as a percent)																																							5.00%
June 30, 2014 (as a percent)																																							10.00%
June 30, 2015 (as a percent)																																							15.00%
June 27, 2016 (as a percent)																																							65.00%
Debt covenants
Revolving Credit and Term Leverage Ratio							3.95	3.93
Revolving Credit and Term Leverage Ratio, Maximum Allowable							5.50	5.50
Bond Leverage Ratio, per Indentures							5.15	5.33
Bond Leverage Ratio, per Indentures, Maximum Allowable							6.50	6.50
Revolving Credit and Term Loan Fixed Charge Coverage Ratio							1.39	1.33
Revolving Credit and Term Loan Fixed Charge Coverage Ratio, Minimum Allowable							1.00	1.20
Commitment fee (as a percent)																															0.50%	0.30%